From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 515ABC4332B for ; Wed, 23 Dec 2020 02:19:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2267522AAF for ; Wed, 23 Dec 2020 02:19:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728491AbgLWCTG (ORCPT ); Tue, 22 Dec 2020 21:19:06 -0500 Received: from mail.kernel.org ([198.145.29.99]:46354 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728479AbgLWCTF (ORCPT ); Tue, 22 Dec 2020 21:19:05 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 957A6221E5; Wed, 23 Dec 2020 02:18:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1608689895; bh=YsnGpQ60SFScxNogHK+LJ5qgKN29yodapC7t1SN1R6s=; h=From:To:Cc:Subject:Date:From; b=LwtqYI1r/nnaEG5L6bCJT3fSK6/QekXbyBE93+cgekRWNdAgq0UQlqB4PMc4H0KbY 71IMTWLlVqjDm+Fm4WbgcwY5Cw7D6x20w/uxe/Uloqpx5R28l06sRefLVWPOY3XGxf klBH/AMStjGtfyQaharRd6ljolpuVOr/qEWh2YkCpLHLfCHqEfoYBoMrBnY/4P786j dlOdxl7LmlUsR995ZebrtCqvWYUMXTTb6304s8cVmvTKuq8cjHu/N37m1DvTeupdFJ rSiK7JqpkbAzRtkKzmWrQ+ABjMJ8NPp6wPItt+73ZBjyVlofv1szAvBuhlyH1BvgRq TNkDrjv3sC1tQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andrew Jeffery , Joel Stanley , Sasha Levin , linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org Subject: [PATCH AUTOSEL 5.4 001/130] soc: aspeed-lpc-ctrl: Fail probe of lpc-ctrl if reserved memory is not aligned Date: Tue, 22 Dec 2020 21:16:04 -0500 Message-Id: <20201223021813.2791612-1-sashal@kernel.org> X-Mailer: git-send-email 2.27.0 MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Andrew Jeffery [ Upstream commit 6bf4ddbe2b4805f0628922446a7e85e34013cd10 ] Alignment is a hardware constraint of the LPC2AHB bridge, and misaligned reserved memory will present as corrupted data. Signed-off-by: Andrew Jeffery Reviewed-by: Joel Stanley Link: https://lore.kernel.org/r/20191016233950.10100-1-andrew@aj.id.au Signed-off-by: Joel Stanley Signed-off-by: Sasha Levin --- drivers/soc/aspeed/aspeed-lpc-ctrl.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/soc/aspeed/aspeed-lpc-ctrl.c b/drivers/soc/aspeed/aspeed-lpc-ctrl.c index 01ed21e8bfee5..dd147af494fdf 100644 --- a/drivers/soc/aspeed/aspeed-lpc-ctrl.c +++ b/drivers/soc/aspeed/aspeed-lpc-ctrl.c @@ -4,6 +4,7 @@ */ #include +#include #include #include #include @@ -241,6 +242,18 @@ static int aspeed_lpc_ctrl_probe(struct platform_device *pdev) lpc_ctrl->mem_size = resource_size(&resm); lpc_ctrl->mem_base = resm.start; + + if (!is_power_of_2(lpc_ctrl->mem_size)) { + dev_err(dev, "Reserved memory size must be a power of 2, got %u\n", + (unsigned int)lpc_ctrl->mem_size); + return -EINVAL; + } + + if (!IS_ALIGNED(lpc_ctrl->mem_base, lpc_ctrl->mem_size)) { + dev_err(dev, "Reserved memory must be naturally aligned for size %u\n", + (unsigned int)lpc_ctrl->mem_size); + return -EINVAL; + } } lpc_ctrl->regmap = syscon_node_to_regmap( -- 2.27.0